Answer:
I would use inverse soh cah toa if you have a TI-84 or above use the 2nd button feature and find soh cah toa if you have a Cassio i cant help you
sorry best i can do
Step-by-step explanation:
10.
You get this answer by doing 10 x 10, which is 100.
10 groups of 10 in 100.
i believe its $6.30
You multiply 42 by .15